Custom tag set that will be added to all measurements, configured as key-value pairs (one per line, in Java Properties file format).
<p>Current build parameters and/or environment variables can be used in the form of ${PARAM}</p>
<ul>
    <li>KEY=${PARAM}</li>
    <li>KEY=PREFIX_${PARAM}_SUFFIX</li>
    <li>KEY=VALUE</li>
</ul>
